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Stello DA100
High-End Digital-to-Analog Converter
(USB input supported)
April Music, Inc.
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Thank you fo r pur chasing DA100 digital-to-analog conver ter.
DA100 is not just an ordinary low-priced DAC in the market but a
simply true h igh-end a udio qu ality 24 Bit/192 kHz upsam pling DAC.
Only the best quality components are used and the world-class
design features which is well known by our legendary DA220 DAC
are adopted in a more com pact platform.
DA100 also comes w ith USB (Universal Serial Bus) standard por t for
the wider P C applications.
Try DA100 with any of your digital sources and you w ill be surp rised
how the digital sound can ch ange into so mu sically involving notes.
DA100 is made especially for you who understand what m usic means
in our daily lives!
Sit back, relax and enjoy the mu sic!
Apr il Music, Inc
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1. Overview
1) Simply High-End D-A Converter
DA100 is simply a reference-quality high-end digital-to-analog converter
which has adopted the state-of-the-art technologies and tuned for the pure
reproduction of the music. It is not just a DAC but a true high-end solution for
the serious audiophiles.
DA100 is equipped with high performance circuitries like special digital
input receiver, true 192 kHz/24 Bit upsampling, jitter free circuit, AKM4395
DAC Chipset which are used only for the top high-end application, 6th-order
digital filter, and the full discrete class A analog output stage.
These functions are only available for those of DAC with the priced at 4 or 5
times more. DA100 is simply a musically-correct high-end DAC as well as its
super performance guarantees the longer time of enjoyment without any
problems.
2) 4 Digital Inputs including new USB 1.1
DA100 has 4 digital inputs. 1 Coaxial, 2 Optical (Toslink) and it also comes
with one USB (Universal Serial Bus) for PC or Notebook connection.
Just plug your computer to DA100 with included USB cable and you will be
amazed by the dramatic upgrade of sound level from your PC. Even a 1/10
compressed 128k MP3 files can be heard as close as the original WAV files
thanks to a special circuitries only designed for DA100.
Not only music files, but you can also enjoy DVD or any music or movie files
in your computer with high-end quality sound.You can also connect your Cable TV settop-box, HDTV settop-box or a Game
machine to experience the real dynamics and wide stage as well as the detailed
micro-dynamics which are only possible through the really high priced DAC in
the market.
DA100 is a versatile reference-audio-quality DAC for the variety of
applications.
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3) Premium Quality Components
Most of the components used in DA100 are true high-end audio quality grade.
All the chipsets are first grade including digital receiver, 24 Bit/ 192 kHz
upsampling chip and DAC (120 dB of dynamic range!).
Premium quality capacitors like WIMA polyprophylene and 1% resistors are
used throughout the whole circuits to guarantee the super quality of audio
playback.
Gold plated RCA connectors are specially selected and the switches are all
industrial standard to support the longer life of usage.
Look carefully into the inside of DA100 and you will find out easily why this
unit is sounding so amazing. No gimmicks but genuine components and true
design!
4) Powerful Power Supply
Power supply for DA100 is also specially designed. 25VA custom-made
toroidal power transformer is used for the fluent supply of energy for the
circuitries.
And the regulation circuit has a very low output impedance
(20m@10Khz) to support the high quality of output power supply for the
circuits with its super low hum and riffle characters.
You can easily change supply voltage by selecting the proper one with
a slide switch. From 100~117V to 220~240V/50-60 Hz, you can use DA100 in
any places in the world.
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2. Front Panel
POWER : Turn the switch lever up to turn on the unit. Red LED will be on to
indicate the DA100 is operating.
UPSAMPLE : You can select either 192kHz/24 Bit upsampling or Bypass.
BYPASS means the digital output is exactly same as the digital input (up to
96kHz/24 Bit).
You should be the judge to decide which mode is better because the musicality
and nuance vary depending on the recording status of the sources.
Generally, we recommend 192 upsampling for most of the playback.
LOCK: Indicate that the input digital signal has been detected by DA100.
INPUT : Select one input you want to listen out of 4 digital inputs.
1 Coaxial, 2 Optical and 1 USB (Universal Serial Bus) inputs are supplied.
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3. Rear Panel
DIGITAL INPUT : 4 input ports are ready (COAX, OPT1, OPT2, USB). Please
make sure that you have to use proper cables for each input.
- COAX : Theoretically, all digital inputs are same in its music quality.
But, in the real world of HiFi, COAX is better than the other
connections (we believe what we hear).
We recommend to use dedicated CD Transport to enjoy
the super quality playback sound from your audio equipments.
- OPT1, OPT2 : Standard Optical inputs (from Toshiba : Toslink)
Industrially well-known as Toslink.
Most of the DVD Players, cable/HDTV settop-boxes,
game machines, PC or notebook sound cards are equipped
with either COAX or Toslink outputs for the external DAC.
In some devices, you should use SETUP menu to set the output
mode of the device to export digital signal through this port.
DA100 accepts PCM signals on ly.
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Set -Digital Out- m ode as -PCM-
From DVD Setup Menu, go to Audio Setup Digital Out
PCM.
Many of DVD or universal players today support digital output
with 96kHz.
Set output to 96kHz because DA100 accepts output up to
24 Bit / 96 kHz. Some CDs, DVDs, DADs outputs 96 kHz signal
and you will be stunned with the reproduced sound!
- USB : Any USB (Universal Serial Bus) output can be connected with this
port.
*Refer to 4.3 for the PC connection.
DA100 does not suppor t ASIO driver .
DA100 is designed for pure playback mode only.
ANALOG OUTPU T : Connect this output to your preamplifier or
integrated amplifier.
Make sure of the right connection for the correct channel
(LEFT & RIGHT).
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4. Connection & Operation
4.1 How to connect
CD TRANSPORT
PERSONAL COMPUTER
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4.2 How to operate
1) Make sure that the level of your preamplifier or integrated amplifier set
to low volume level.
2) Turn the Power Switch up (Red LED will lit).
3) Select your input by rotating the INPUT knob (COAX, OPT1, OPT2, USB).
4) Check if the LOCK signal is on. If the LOCK LED is not on even though
you set the knob for your selection, please check the wiring again for
proper connection.
5) Set the UPSAMPLE lever switch either up position for 192 upsampling,
or down position for BYPASS mode. You can change this setting during
playing music.
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4.3 USB output setting for your PC or Notebook
1) Connect your PC to DA100 with bundled USB cable.
2) Your PC will automatically detect DA100 by flashing the sign USB
DEVICE CONNECTED to indicate the connection.
3) Play audio or video files with your favorite player (Window media
player etc.)
4) If your PC or Notebook fails to detect USB as your main audio output,
you should set the default Sound & Audio Device as USB.
Select Start Control Panel Sound & Audio Devices
Audio, then Select USB Audio DAC.
If you do not want to use DA100 as your default output device, you maychange your setting again by selecting the supplied sound card output
with the same procedure.
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5. Features & Specifications
Features
Digital input interface
- Strong protection against external interferences
- Minimizes transmission errors
- 200 mV sensitivity on all SPDIF inputs
Upsam ple & D/A Converter
- ARSC (Asynchronous Sampling Rate Conversion) functions
specially designed clock circuitry for extremely low jitter
Upsampling to 24 Bits / 192kHz
THD : 133 dB
Dynamic range : 142 dB
- D/A converter upsampling caracteristics
Signal to Noise ratio : 120 dB
Dynamic range : 120 dB
Prep rocessing filter
- Custom designed Sixth order filter circuitry for minimal noise and
distortion
Ana log output stage
- Class A Push-Pull output stage with full discrete components.
Front display and control
- Main AC power switch and power indicator
- 192KHz/Bypass selection switch
- Digital input LOCK LED indicator
- 4 digital input selection rotary switch
Power supply
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Custom-made toroidal transformer
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SPECIFICATIONS
Digital inputs 1 COAXIAL
2 TOSLINK
1 USB
Digital filter Proprietary 6th-order digital filter
Analog o utput 1 RCA Unbalanced stereo
1.2 Vrms output voltage
Dynamic range 110 dB typical
Signal to Noise ra tio 120 dB typical
Distortion 0.003 %, 1kHz
Frequency range 20 ~ 45 kHz
Sampling frequency ASRC : Bypass, 192kHz
Digital input receiver : up to 96kHz
Power requirement 100~117 VAC/ 220~240 VAC selectable
50/60 Hz
Dimension 212(W)x55(H)x290(D) m/m
Weight 3.5 kg (4.5 kg, packaged)
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WARRANTY
April Music, Inc. supports 2 years of free w arran tyfor DA100 under normal
use from the date of delivery.
This warranty extends only to the original purchaser and does not apply to the
parts that have been subjected to misuse, or abnormal operations. If the second
hand user wants to inherit the warranty period, he (she) should contact April
Music, Inc, by send an e-mail or a letter to activate the remaining warranty.
In the event of failure during the warranty period, April Music, Inc. will repair
the DA100 at no charge as long as the unit is not working under normal use.
If the unit is damaged by the abnormal use (incorrect voltage connection,
spilling coffee over the top etc.) and if you or your dealer can not fix the
problems, the unit should be returned to the factory.
In this case, the estimate repair fee (including shipping & handling) will be
submitted before the repair for shipping.
A return authorization is required when sending the units for repair. They must
be shipped to April Music, Inc, prepaid and with its original cartoon (preferred).
There are no user serviceable parts inside except the voltage changing. And
DA100 is running very hot inside because all analog outputs are full class-A
operated discrete circuit. Care should be taken.
If you or any unauthorized persons have tried to change or modify the circuits
without any prior consent from April Music, Inc, all the warranty will be void
even the units are under warranty period.
* Do not try to mo dify the pro ducts by any unauthorized per sons!
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Contact Information
Apr il Music, Inc
Alpha Building, 884-18 Ban gbae-Dong
Seouch o-Gu, Seoul, Kor ea, 137-860
South Kor ea
Pho ne: +82-2-3446-5561
Fax: +82-2-3446-5564
W eb : www.hifi500.com
Pur chasing inquir ies : [email protected]
Technical inquiries : [email protected]
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